Posi-joists Jun 2026

Here is the moment every homeowner falls in love with Posi-Joists: the plumber arrives. Or the electrician. Or the HVAC technician.

Posi-joists, also known as metal web joists, are an engineered structural system that combines the lightweight properties of timber with the high strength of a steel metal web. Often referred to as "engineered joists" or "Posi-struts," they are designed for use in both floor and roof applications, offering a versatile alternative to traditional solid timber or I-joists. What is a Posi-Joist?

While both are popular engineered timber products, they serve slightly different needs: Minera Roof Trusses posi-joists

The most distinct advantage of the Posi-Joist is the open web design. Plumbers and electricians can run pipes and cables directly through the joist without the need for drilling or notching. This eliminates the risk of structural damage caused by tradespeople drilling through structural members incorrectly. It allows for HVAC ductwork to be routed within the floor depth, maintaining ceiling heights without dropping ceilings or creating bulkheads.

A Posi-Joist is a parallel chord truss consisting of three primary components: Here is the moment every homeowner falls in

(also known as metal web or open web joists) are an engineered timber flooring and roofing system that combines the lightness of wood with the strength of a "V" shaped steel web. This hybrid design allows for significantly longer spans and easier utility installation than traditional solid timber. Key Advantages

Engineered timber is less prone to shrinking, twisting, or warping compared to solid wood. This stability helps prevent common "creaky floor" issues and reduces the risk of ceiling cracks in the finished building. Posi-Joists vs. Traditional I-Joists Posi-joists, also known as metal web joists, are

: While the main body cannot be modified, specialized designs like the DWB Posi-Joist Trimmable End incorporate solid timber blocks that allow for up to 130mm of site trimming. Top Benefits of Posi-Joist Systems 1. Simplified Service Installation

The standout feature of Posi-joists is their . Unlike solid timber or I-joists, which require labor-intensive drilling or "notching" to pass through pipes and cables, Posi-joists allow services like plumbing, electricity, and MVHR (Mechanical Ventilation with Heat Recovery) systems to be routed through the gaps with zero structural modification. 2. Greater Span Capabilities

A Posi-Joist isn’t just a piece of the frame—it’s a piece of intelligence. It accepts that modern homes are not just places to walk, but complex ecosystems of heat, power, and water. By lifting the floor slightly and adding a web of steel, it turns the forgotten space beneath your feet into a thing of elegant, functional beauty.